Study On General Scroll Profiles Integration Design Theory And Methodology

With the rapid development of automobile industry and popularity of refrigeration equipment and requirement of many industry such as electron, power, light industry, machinery, chemistry, medical appliance, medical preparation, vintage and food or machining center for compressing medium and other special requirement and the effect of energy shortage, compression theory with the work principle of conjugation curve engagement and cavity volume chaging is studied all over the world. Compressor is the key component of refrigeration and air-conditioning equipment, and the work efficiency of compressor is very important for the whole refrigeration cycle system. Therefore, the scroll compressor has a great significance for decresing energy consumption and improving human life quality for its high efficiency and low noise.To study the inherence of scroll profiles radically, the dissertation proposed the subject"Study on General Scroll Profiles Integration Design Theory and Methodology", sponsored by the National Nature Science Foudation of China (NSFCNo.50475063) and Specialized Research Fund for the Doctoral Program of Higher Education for supporting the project (SRDPHENo.20030611002). In the dissertation the major work and tasks are described as follows:①Summary of current literature related this subjectThe dissertation reviewed the development progress of scroll compressor technology and summed up some new requirement and development trend of scroll compressor technology. Summaried the current state of the scroll compressor technology and relational study region.②Study on geometry theory and engagement characteristics of scroll profilesAiming as the limitations of scroll profiles in existence, the whole characteristics and local characteristics of plane curve instinct equation were studied. Analyzed the equidistant curve of envelope principle, normal equidistant curve creating method and envelope equidistant curve creating method were gained. Transformation of coordinate's methodology of scroll profiles was deduced and plane engagement theory of scroll profiles was given up.③Study on general scroll profiles and conjugation meshing theory of polygonThe composing principle and determinant method were given up. Studied the necessary of control equation of general scroll profiles and gained two creating methodologies of conjugation scroll profiles.④Study on general scroll profiles integration design theory and its expression varying characteristicsUsing the method of series, polynomial equation mathematic expression based on instinct equation of radius of curvature was analyzed. General scroll profiles integration design theory was given up and gained the integration scrolls of general scroll profiles. The coefficient parameters transform characteristics of integration scrolls of general scroll profiles was studied. The speciality and general character of integration scrolls of general scroll profiles were given up. Through developing integration scrolls of general scroll profiles, the new scroll profiles can establish. The conjugation scroll profiles were deduced by the methods of equidistant curve and control equation.⑤Study on parameter design and shape optimization of the integration scrolls of general scroll profilesAiming at Coefficient parametric variation characteristic of general scroll profiles integration scrolls was studied and examples were given up. Using optimization design method, the mathematic model of integration scrolls of general scroll profiles was established and the analysis examples were given up. By analyzed the equal wall thick and variational wall thick scroll profiles, the scroll profiles were gained, which can satisfy the requirement of excellent performance.⑥General scroll profiles compressor modeling simulation and FEM analysisStudied the model foundation of scroll compressor for movement simulation. Using MATLAB software to gain a series of range of points about tangent angle parameter and using PRO/ENGINEER to create the fixed and orbiting scrolls. Analyzed the construction and performance of scroll compressor to establish dynamic simulation model of general scroll profiles compressor. Using ANSYS to make FEM analysis for the orbiting model and got the integration displacement transfiguration and equivalent stress transfiguration diagram and verified the validity and practicability of general scroll profiles integration design theory.⑦Model machine manufacture and experimental investigationComponent material and processing procedure were given up. Model machine drawing and model machine of general scroll profiles compressor were gained. Through testing the model machine and got the conclusion which verifying the correctness of general scroll profiles integration design theory and methodology.